I'm thinking it's the alternator.
REMOVAL & INSTALLATION
See Figure 10
1.Disconnect the negative battery cable.
2.Loosen the lower mounting bolt but do not remove it.
3.Loosen the pivot bolt, but do not remove it.
4.Loosen the belt adjusting bolt.
5.Remove the alternator drive belt.
6.Remove the bracket.
7.Remove the lower mounting bolt and pivot bolt.
8.Remove the alternator.
9.Disconnect the alternator field circuit plug.
10.Remove the B+ terminal nut and wire.
11.Attach the alternator and bracket to the engine, then tighten the mounting bolts to 40 ft. lbs. (54 Nm).
12.Install the drive belt onto the alternator pulley. Make certain that the belt is seated correctly on the pulley.
13.Install and tighten the B+ terminal nut and wire to 75 inch lbs. (9 Nm) onto the new alternator.
14.Connect the alternator field circuit plug.
15.Connect the negative battery cable.